Method of and means for installing subdrain pipe



n 9, 194 F. L. CARSWELL ET AL 2,186,364

METHOD OF AND MEANS FOR INSTALLING SUBDRAIN PIPE Filed Juhe 21. 1939 2Sheets-Sheet l Fly. 7.

- INVENTORS.

Erma/7 A. 64/5/ 6/4 BY 0770 M 5677/77/17? Jan. 9, 1940. F, CARSWELL ElAL 2,185,364

. METHQD OF AND MEANS FOR INSTALLING SUBDRAIN PIPE INVENTORL 7 57 /7740A Oarsn e/A l f2 07 7? M4 56/7/77/47? ATTORNEYS.

' Patented Jan. 9, 1940 mn 'rnon' OF Firman L. Oarswcll, Johnson County,Kans, and

Otto W. Schmidt,

Application June 21, 1

. '10. Claims.

This, invention relates to the method of and means for installingsubdrain pipesj and par ticularly for installing drain pipe beneathroadways, railroads, etc., where it is importantthat the drain pipe beencased ina per'viousmaterial.

In the maintenanceof. paved roadways, railroad beds, etc., it is veryimportant to keep the sub-grades free from the accumulation of excessivewater1which might materially lend to the. rapid destruction of thesuperstructure. Fast moving, heavy traffic passing over the roadway orrailroad soon causes .abr'eaking down i. of the superstructure abovethewater; pocket,

thereby necessitating expensive repairs.

; Drainage tubes have been used to drain EX? 'cessive water beneath theroadways, etc., but in view of the fact' that it is deemed advisable toencase the drainage tubeina pervious' mate-'- rial, such as crushedrock, to maintain the open} ings to the tube in proper condition. andtosupport the road loads, it has" been found necessary to, cutaway andreplace the surfacing material during the placement of the drainagetubes. Due to the fact that this operation is very expensive andinterferes with the use of the roadway during the repair work, it hasnot been deemed advisable in many instances- The principalobjectof,thefpresent invention is the provision of a method whereby drainpipecan be easily and quickly'encased'in a pervious materialbeneatharoadsurfacing materialwith- I out disturbing the surfacingmaterial of the. road and without interfering with the trafiicthereover.

A further object of this invention is the pro vision of a device forencasing, a drain pipe in a perviousmaterial, including said drain pipeasapart of saidmeansll f,

Other objects will appear during the course of the specification,wherein reference is had to the drawings in which:

Figure, 1 is a perspectiVevieW of a tamping, tool used in carryingout-the method. 1 of this invention. I Fig. 2,is aperspective view ofthe trough and drainage tube in operative relation. v

Fig. 3 is an enlarged ,sectional ,view, of the equipment in position,taken 'on line III-III of Fig. 10. H v

' Fig. 4 is'an enlarged crosssectiona on line IV-IV"of1Fig. 2.v Q

l view taken Fig. 5 is a longitudinal; sectional'zview oil a s pa ally ptioned on the dra n series of trough pipe.

Kansas City, Mo.

939, Serial No.1 280,330

' Fig filis asidevelevatio of the tamping tool.

Fig. "I'isa plan view of the tampingtool'.

Fig. 8 is a plan View of a paved roadway, showing the positioning ofdrainage tubesjthereunderg Fig. 9is ajsectionalviewof a paved roadwayshowing a. hole bored in the sub-structure with the drain pipepositioned therein.

FigglO "is asectional view similarfto that shownin Fig. 9, withthetroughs and tamper in position." v u 10 a Fig. 11} is a sectional..view of the roadway showing the drainage tube installed.

Fig. 12 is a modified form showing "a specially constructed trough,having means whereby ity is secured for longitudinal movement on a rounddrain tube;.and, l

Fig. 13" is a fragmentary elevatio the parts as shown in Fig; 12. l I vH Throughout theise'veral ;.views, like :reference :characters designatesimilar parts'and the numeral 20 isa'drain pipe'of semi-circular formhaving flanges 22,; and "drainage openings1.2 4 beneath thecorrugated-top-26Q This i-drainage pipe is suitable for (positioning-finthe sub-soil for draining surplus water therefromgand when properlyembedded in crushed rock, it wil'l support heavy loadsof trafiic on thepaved surface. A sectional .trough'28 jconsist s' of'aseries of.tr'ough'units 30' joined tog'ether'by- U-shaped members' ,32 which aresecured to adjacent abut ting trough units, by means of bolts '34passing throughholes 36. Anydesirable length of trough '28 maybehadbyrjoining together the proper nalf view of numberjof units 30. v

Each trough unitisprovided with an inwardly turned angle iron, 38 which,extends below the bottom "of the trough a sufficient distance to formagroove 40 suitable to receive the flanges 22 0f the.drainage pipe, thusmaking it possible to' secure the trough to the 'drainage tube' iofr. f

longitudinal movementtherealong. i Atamping tool 42 comprises a head 44having asectional handle 46,- by means'oi whichgthe head.is movedlengthwise of saidtroug'h to po' ,sition a perviousmater-ial, such as;chat,v as 3.

refill j about thedrainage pipe,as hereinafter 'set I' .forth. v V

*The. tamper-head 44- is substantiallythe fruslower-lip 48 whichisadapted to ,reston the ,bott'omof the trough 28, during the tamping'operation. The enlarged end of thehead ispro; yid'edwith a top extension50 which functions to move the pervious material to the drainage pipe.

tum ofQa pyramid with a forwardly projectings y v position about anylength or position to meet sections 41 may be removed as the tampingoperation proceeds and the length of the hole is reduced. v

Referring to Figs. 12 and 13, it will be noted vthattrough 28 is shownmounted on a round drainage pipe 52. It-will also be noted'that thetrough-is provided with downwardly converging ,members that serve toengage the walls of the drain pipe below the center line thereof,thusprecluding transverse separation of the joined parts. The upperedges of trough 28 are-shown rolled as at 54.

Referring now to the method of installing subdrain pipe, reference willbe had to Figs/8, '9, 10 and 11.

Fig. l is a plan view of a highway having a sectional slab surface withthe usualtransverse, expansion iointsBZ ,and shoulders -84. The dottedlines indicate atypical installation of the subdrainage pipe. I

The 'flrststep in the procedure is to .form a trench across the shoulder64 atright angles to the roadway or whatever angle is desired. forpositioning the drainage tube. The secondstep is the forming of a holebeneaththepaving at an outwardly and downwardly inclined. angle,sufficient to properly drain the pipe. This hole is made of muchgreaterv cross. sectional area than that of the drainage pipe, to beusedso as to permit of a sufficient amount of refill material to surroundthe drainage pipe. Any earth be tween the top of the'bored holeand thebottom surface of the paving is broken down and raked fromthe hole. Insome instances the circular, bored'hole will be used without the removalof any dirt from the top thereof.

The hole is usually bored to extend to orbeyon-d the center'line of theroadway, but maybe of the particular drainage problem.

The drainage pipe is now positioned in the hole and care is taken to seethat'it has an even bearing throughout itslength. The trough Z8 is nowslid to position overthe drainage tube, ,with

its end'positioned a short. distance from the inner end of the drainagepipe. A small quantity of pervious material, such as crushed rock, isnow shoveled into the protruding endportion of the,

trough 28,,andis rammed to the back of thehole or tunnel by means of thetamping tool 42.

When the inner end of the holeis tamped full, the trough is slippedoutwardlyto permit :the positioning of more crushed rock withoutembedding the end of the trough therein. This operation is repeateduntil the tunnel is completely filled and the drainage pipe beneath thepaving is completely encased in the pervious material. v I

. The last step, is the laying of the line of'pipe 10 across theshoulder to the road-sideditchlZ, and the refilling of ditch 66. Duringthe progress of the tunnel refilling operation, sections of the'trough28 and tool handle 42 may be-removed. 7

It is apparent that this method of positioning a drainage pipe, properlyencased in a shield of pervious material within a tunnel formed beneatha'pavement, provides an extremely rapid and-economical method ofinstallation with the removalof a minimum amount of 'theroad'bedmaterial, and without'interfering with the usual traflic overthe'roadway. 5

Having thus described the invention, what is claimed as'new and desiredto be secured by Letters Patent is:

p 1. Means for installing a subdrain pipe in a tunnel comprising adrainage pipe; a trough slidably secured to said drainage pipepositioned in said tunnel; and a tamping tool operable within saidtrough whereby a pervious material is tamped in said tunnel about saiddrainage pipe.

2. Means for installing a subdrain pipe in a tunnel comprising adrainage pipe adapted to be positioned in said tunnel; a trough securedto said .drainagepipe for relative longitudinal move- :mentwtherealong;and a tamping tool operable in said trough whereby pervious materialdeposited in the trough ispositioned to encase said drainage pipe insaid channel.

3.,Means:forinstalling a subdrain pipe in a casing of pervious materialwithin a tunnel, comprising a drainage pipe adapted to be positionedwithinsaid tunnel; a sectional trough secured to said drainage tube ,forrelative longitudinal movement thereon; and a tamping tool operable.insaid trough to moveperviousmaterial deposited in the trough outsidesaid tunnel to a position within said tunnel and about said drainagepipe.

4. Means for installing asubdrain pipe in a casing of pervious materialwithin a tunnel comprising .a drainage pipe having outwardly extendingtop flanges and adapted to be positioned in'said tunnel; a sectionaltrough having grooves formed in the bottom portion thereof to receivethe drain pipe flanges whereby the trough is secured forlongitudinalrelative movement thereon; and a tamping tool adapted tobereciprocated in said trough to delivera pervious material to the endthereof and tamp it about said drain pipe.

.5. Means for installing a subdrain pipe in a casing of perviousmaterial within a tunnel comprising a drainage pipe having outwardlyextending top flanges and adapted to be positioned in said tunnel: asectional trough having grooves formed in the'bottom portion thereof toreceive the drain pipe flanges whereby the trough is secured forlongitudinal relative movement thereon; and a tamping tool having aforwardly projecting lowerlip adapted to be reciprocated in said troughto cause a pervious material, delivered to said trough, to bemoved. to aposition about said drainage pipe.

6. The method of encasing a drainage pipe in a coating of ,perviousmaterial within a tunnel,

"comprising inserting'said drainage pipe into said 'tion of said troughextended outside said tunnel;

introducing a quantity of pervious material into 'saidtrough;reciprocating a tamping tool in said trough to move said perviousmaterial to a tamped position about that portion of thedrainage pipebeyond said trough; moving the trough to a distance outwardly along saiddrainage pipe and again tamping pervious material about said drainagetube; continuing this operation until the portions of the drainage tubewithin the tunnel is encased in said pervious material.

7. The method of encasing a. drainage pipe in a coating of perviousmaterial within a tunnel comprising inserting said drainage pipe intosaid tunnel; positioning a trough for longitudinal movement on saiddrainage pipe with the inner end thereof spaced apart from the inner endof .Qui

portion of the drainage tube within the tunnel is said drainage tube andwith the outer end portion of said trough extended outside saidtunnel;in-

troducing a quantity of pervious material into said trough;reciprocating a tamping tool in said trough to move said perviousmaterial to a tamped position about that portion of the drainagepipe'beyond said trough; repeating this operation until that portion ofthe drainage-tube beyond the trough is encased in the pervious material;moving the trough outwardly along said drainage pipe a short distanceand again repeating the operation of tamping pervious material aboutthat portion of the drainage tube between the trough and the perviousmaterial .previously tamped; then continuing these trough moving andtamping operations until the tunnel is completely filled.

8. The method of encasing a drainage pipe in a coating of perviousmaterial within a tunnel comprising inserting said drainage pipe intosaid 4 tunnel with a portion thereof positioned outside introducing aquantity of pervious material into said trough; reciprocating a tampingtool in said trough to move said pervious material to a tamped positionabout that portion of the drainage pipe beyond said trough; moving thetrough a distance outwardly along said drainage pipe and again tampingpervious material about said drainage tube; continuing this operationuntilthe encased in said pervious material,

9. The method of encasing a drainage pipe in a coating of perviousmaterial within a'tunnel comprising inserting said drainage pipe in saidtunnel; mounting a trough in said tunnel with its inner end portionspaced outwardly from the inner end of said drainage pipe deliveringapervious material along said trough to encase that portion of thedrainage pipe beyond said trough;

movingwsaid trough outwardly a-short distance and again deliveringpervious material to encase another section of the'drainage pipe; andcon tinuing the outward adjustment of the trough and the delivery ofmaterialitherethrough until the drainage pipe within the tunnel iscomplete:-

ly encased in pervious material.

10- The methodof encasing a drainage pipe in a coating of perviousmaterial \mthin a tunnel comprising inserting said drainage pipe in saidtunnel; mounting a trough in" said tunnel with its inner end portionspaced outwardly from the inner endof said drainage pipe delivering apervious material along said trough and tamping the same to encase thatportion of the drainage pipe beyond said trough; moving said troughoutwardly a short distance and again delivering and tamping perviousmaterial to encase another section of the drainage pipe; and continuingthe outward adjustment of the trough and the delivery of materialtherethrough. and tamping the same until the drainage pipe within thetunnel is completely encased in ,perviousmaterial.

' 'FIRMAN L. CARSWELL.

OTTO W. SCHMIDT.

